Hydraulic motor for wagon-dumps.



J. E. CAMP.

HYDRAULIC MOTOR FOR WAGON DUMPS.

APPLIUATION FILED JAN. 8, 1906.

909979., Patented Jan. 12, 1909.

2 SHEETS-SHEET 1.

W ETNEEEEL-E- J. E. CAMP.

HYDRAULIC MOTOR FOB. WAGON DUMPS.

APPLICATION FILED JAN. 8, 1906.

90 279,, Patented Jan. 12, 1909.

2 SHEETS-SHEET 2.

I N V ENTER. @7009077 @lfifp,

W ETNEEIEIEE UNITED STATES PATENT OFFICE.

JOSEPH E. CAMP, OF WASHINGTON, ILLINOIS, ASSIGNOR TO CAMP BROS. & 00., OF METAMORA, ILLINOIS, A CORPORATION OF ILLINOIS.

Specification of Letters Patent.

Patented Jan. 12, 1909.

Application filed January 8, 1906. Serial No. 225,194.

To all whom it may concern:

Be it known that I, Josnrn E. CAMP, citizen of the United States, residing at Washington, in the county of Tazewell and State of Illinois, have invented certainnew and useful Improvements in Hydraulic Motors for VVagon-Dumps; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will en able others skilled in the art to which it appertains to make and use the same.

This invention has reference to wagon dumps of the hydraulic variety and has for its object the improvement and simplification of that class of mechanism.

A further object of the invention is to have a fluid pressure receiving cylinder which also answers as the fluid container or reservoir.

The invention further relates to certain other objects together with a peculiar combination of parts as will be pointed out in. the following specification aided by the accompanying drawings in which,

Figure 1 is a side elevation of the wagon dump showing the pumping cylinder in part section. Fig. 2 is a plan view of the dump and, Fig. 3 is a detail view of a clutch device shown in Fig. 2.

A A indicate two parallel timbers of thedump-frame which are tied at their ends by means of short cross pieces B B as shown in Fig. 2, the latter resting upon the former and bolted thereto to constitute a rigid frame that may be dragged over the ground or otherwise transported from place to place, though from the structure to be described presently it will be seen that the mode of transportation can be more easily undertaken by placing the dump upon trucks or upon a wagon, this, however, being at the wish of the user.

I have not shown in the drawing the tongue by which the dump is transported from place to place since this has been brought outin my former application filed June 15, 1905, No. 265,301.

At the middle of the frame two cross members C C are secured to the longitudinal beams A A described, between which is located a vertically placed cylinder D having at substantially the middle of its length a horizontal pumping cylinder E. Diametrically opposite the pump is a boss F as shown in dotted lines in Fig. 2 and this boss together with the ump E constitute trunnions for the cylin or D upon or by which it may rock as will be hereinafter explained, the cross members C C being bored to receive the said trunnions all of which will be understood without further explanation. The cylinder E is properly bored out to receive a piston E, being provided with a stufifing box at E the pistonrod E having connected therewith an eccentric-rod G to which motion is imparted by an eccentric H on a transverse shaft J on one of the end members B such shaft receiving its motion from a horse-power or engine or other power. The eccentric is provided with a notched hub H which is free of the shaft J and ad'oining it is a shifting collar K keyed to the s aft by the feather L. This collar is grooved to receive a lever M pivoted on the dump frame by which it may be shifted toward or away from the eccentric whereby the said eccentric may be driven to operate the pump or released to sto the action of the latter.

l orward of the cylinder D is a small vessel 1) for containing a small quantity of fluid and its top is connected into the upper part of the cylinder D by a pipe N, and at its side the vessel is again connected into the cylinder by a pipe 0. The bottom of said vessel is connected to the pumping cglinder E by means of a pipe P which has a c eck-valve Q permitting fluid to pass from the vessel to the pump but not in the other direction. Connected into the pipe 1 between the checkvalve and the ump is a pipe R which has connection witii the bottom of the cylinder D. Said pipe R has a check-valve S therein for allowing the passage of fluid downward to the cylinder but not in the reverse direction. There isalso connected into the vessel D a ipe T having attachment with the ipe R between the check-valve S and its i et end to the cylinder D. In this pipe T is a cutoff valve U operated vby a lever on a rockshaft W journaled on the dump frame. The rock-shaft has a lever at extending up from said rook-shaft which is connected to the lever Y of the valve'U by a link Z as shown 50 forcing said wagon for holding and raising the same but this has been described in former applications of'mine and will need no further explanation here. The stirrup mentioned is provided with an'additional stirrup 6, Fig. 1, one end of which is loosely connected to the stirrup 5 by means of a link 7. The stirrups 5 are used for wagons having a low axle while the stirrup 6 is employed for wagons having higher axles and it will be seen that the latter stirrups can be thrown over out of 1 the way as shown in dotted lines and may be replaced as shown in full lines at any time. A filling member 8 is formed with or secured to the stirrup1 6 of the desired height to accommodate t e difierent axle positions as will be understood.

It will be noted that the. frame A B is planked over so that the wheels of the wa on 9,0 may readilypass over or rest thereupon w en 1 dum ing. Also, it is seen that approaches to t e platform are provided so that the wheels can pass easily up and down. To the rear ofthe dump is stationed a chair 9 to which is suitably secured the ends of two reaches 10 and 11, Fig. 2,.-the forward ends of which are secured t0 the platform as shown in" said Fig. 2. Pivoted to' the chair is a reach 12 which at its opposite end is pivotally attached to the cross-head 4 by ugs 13 on the latter and a bolt 14. The

length of the reaches 10 is such as to have the chair 9 just beneath the rear axle of the wagon. As the wagon rises the reach 12 steadies the piston-rod and tilts the cylinder D on its trunnions, this having been described in my former a plication. I

In ractice t e cylinder D, the vessel D and t e pipes are all filled with the fluid, preferably oil of a heavy grade, and when it is desired to raise the iston 2 to dump a ya on, the clutch mec anism on the shaft J 1s. t r wn into engagement while said shaft is rotating thus setting the pump E to work.

i Oil is thus drawn from the vessel D and R into the lower portion of the cylinder thereof; the latter being raised. In'rising, the piston dis laces'the oil 1 above it into the vessel throu h' the pipes N and 0 from which it is drawn y the pum and forced into the bottom of the cylinder This action continues until the piston 2 has reached the dotted lines above the pipe 0 as shown in Fig. 1 at which point the piston remains; the oil'then mere] circulates through and through the cylin er and the vessel D",'the weight of the wagon being supported by the oil. If, however, the um .60 be stop ed at this time the iston l fa below t' e pi e O and-remain ed as before, still sup ortmg the wagon. When desired to lower t e wagon after the grain has been delivered, the valve U is opnrlied and the oil being under pressure wit .sure at all times has the cylinder finds an outlet throu h the pipe R and ipe T back to the vessel 1% from whence it ows back into the cylinder above the piston; The operator if he desires may interrupt the movement of the piston at any desired point during the dumpin opleration by slightly opening the valve t ereby dividing the pressure from the pump so that a portion of the oil will return to the vessel D while the residual pressure will be sufficient to sustain the piston at practically a fixed position. The piston may be thus held at any height or it may be also controlled by means of the clutch mechanism ,described since all that is necessary is to stop the eccentric to allow the entire apparatus to come to a position of rest,

the piston bein thus stop ed at an height desired after w ich the va ve U wil permit said piston to lower as before.

I am not aware of a hydraulic jack of any kind wherein a continuously operated ump furnishing a substantiall uniform flui prese'en employed and wherein said fluid pressure has been divided by a valve to permlt a portion of the fluid'to return to the source from which it is drawn while at the same time using the remaining fluid to sustain the piston at a given point inthe manner described herein.

By my improved construction it may be seen that the cylinder constitutes its own reservoir for the bulk of the oil, the vessel D Y and its connections being the means throu 11 which the oil passes from one side of the piston to the other. All of the. oil necessa for the full stroke of the piston cannot be he d in the c. linder and the balance is held in the vesse D. This will be clear when it is remembered that when the iston rod'is entirely within the cylinderlt' occupies a certain place and must displace oil of an equal bulk which will be found in the said vessel D, there being already oil contained within and sufficient to fill the cylinder. As the oil is pum ed from the top of the cylinder be' neath t e iston and the latter rises the piston-rod wiil be gradually replaced 'by oil. It is evident, therefore, that more oil is required to fill the cylinder when the piston is up than when it is down. The needed amount for the purpose is therefore drawn from the tank. It is clear from the fore 'oing. that the piston could not be raised to its full height on account of lack of oil but by havin an auxiliary oil container the lack is readi y suplplied since after the pump has exhausted t e oil from the top of thecylinder and forced it beneath the piston it then draws upon the oil in the vessel D. The vessel also provides for the circulation of the oil through it from the pipe T to the'pipe P when the piston is held at an point e ow the outlet at O, (by the partia ly open valve U) the oil in that case neither entering nor leaving the cylinder at the top; the pumppressure, as before eoaevo beneath the piston and 1. A cylinder and its piston, a pump adapted for a continuous action a pipe connecting the same with the top of the cylmder, a check valve in said pipe, a second pi e connected at one end to thefirst between t e check valve and the ump and connected at its other end into the bottom of the cylinder, a check valve therein, a third pipe connected into the second between its check valve and its end connected with the cylinder and having communication with the top of the cylinder, a manually controlled valve in said third pipe for permitting the free return of the fluid from the bottom to the top of the cylinder indeendent of the continuously acting pump, or tor dividing the pressure above and below thepiston to cause the latter to remain at a desired elevation, there being a second fluid connection for the pump the same having connection with the top of the cylinder for permitting suction from the latter to the pump, said connection also acting as a pressure relief for the pump when the piston has raised to and remains at a given position as described.

2. A cylinder and its piston, a pump adapt ed for a continuous action, there being two openings in the upper part of the cylinder, a slngle conduit connectingsuch openings with the ump, a check valve in said conduit, a con uit connected at one end to the first between the pump and the check valve and at its other end to the bottom of the cylinder, a check valve therein, a conduit connected into the last named pipe between its check valve and its end having connection with the cylinder, and having communication with the openings at the top of the cylinder, a controlling valve therein for governing the rate of flow of fluid therethrough from the bottom of the cylinder, or for dividing the flow under pressure substantially as and for the purposes described.

3. A substantially vertical cylinder mounted to oscillate on a horizontal axis, a piston therefor, a pump having the axis of its cylinder substantially coincident with the pivot of the cylinder and adapted for continuous o oration, a pipe connecting the pump with t e top of the cylinder, a check valve therein, a pipe connected at one end into said pipe between the check valve and the pump, and at its other end into the bottom of the cylinder, a check valve in said pipe, a pipe connected at one end to the last named pipe between its check valve and the cylinder, its other end having communication with the top of the cylinder, and a controlling valve in said pipe for the purposes explained.

4. In a hydraulic jack, a cylinder carried on horizontal trunnions, a pump adapted for continuous action whose cylinder axis is substantially coincident with the axis of the trunnions, a pipe connection between the pump and the top of the cylinder, at check valve therein, a second pipe connected into the first between the pump and the check valve and into the bottom of the cylinder, a check valve in said second pipe, a third pi e connected into the second between its chec valve and the cylinder and having fluid connection with the top of the cylinder, and a controlling valve in said third pipe.

5. In a portable jack, a cylinder mounted on horizontal trunnions substantially midway between its ends, a continuously acting pump, one of the trunnions forming the cylinder for said pump, a fluid connection between the ump and the top of the cylinder, a check va ve therein, a pipe connected into such fluid connection between the check valve and the pump and to the bottom of the cylinder, a check valve in such pipe, a pipe connected at one end into the latter and communicating with the top of the cylinder, and a controlling valve in said pipe.

6. A portable hydraulic jack comprising a substantially vertical fluid containing cylinder having transverse trunnions, and a piston and piston rod, a pump carried by the cylmder, a fluid conduit connecting the pump wlth the top of the cylinder at two diferent elevations, a check valve in the conduit, a pipe connected with the conduit between t e check valve and pump, said pi e having connection with the bottom of the cylinder, a check valve in the pipe, a second pipe connected into the first between the check valve and the cylinder, its other end having connection with the conduit between the check valve and the top of the cylinder, a manually operated valve in. the last described ipe, all of the described parts being carried y the cylinder, and a portable support upon which the entire apparatus is mounted.

7. A fluid containin cylinder and its piston, a pump, a vesse connected with the pump and connected also with the top of the cylinder said vessel being provided for holdin fluid in excess of that contained in the cylinder, a check valve between the pump and vessel, a pipe connected between the ump and check valve and also connected mto the bottom of the cylinder beneath the piston, a check valve in the pipe, a second pipe connected to the latter between its check valve and the cylinder and also connected into the vessel, and a controlling valve in the said second pipe for the purposes named.

8. A fluid containing cylinder, a pump, a vessel connected therewith and also having connection with thetop of the cylinder, a check valve between the pump and the vessel, a pi e connected between the check valve an the pump and connected into the bottom of thicylindei iisenmimts piston,

achec'k valve in said ipe, a second connectedbetween the ask valve an ,t e bottom of the cylinder-and connected also in the i e. a

vessel, and a controlling valve in said second fluid containing cylinder and its iston, .a vessel-for receivmg' and holding uid tione between the vessel and theto expelled from the cylinder b the piston-rod,

a 1m a i e connecting t 0 pump and the bciltomof i lh cylinder, a pipe connecting the fluid vessel and the pum a relief pipe for the vesselthroug anotherof said ipes,acontrolling-valve in the latter pipe, t ere also being provision for ermitting flow of fluid from the pump to t e bottom of the cylinder, the

pipes oonnectinfirthe vessel permitting flow of fluid in each action to and from the cylinder and the vessel for the purposes set forth.

cylinder, s. p1ston an .10. Ina h draulic jack, a. substantially piston-rod in the are 0 a circle in its vertical movements. 1 11. In a hydraulicjack, a fluid containing piston-rod therefor, a pump a conduit connecting it with the top of the cylinder at two diiferent elevations, a pi e bottom of the cylinder a check valvein the manually controlled passage connected also with the conduit and with the pipe substantially as described.

In testimony whereof I afiix my signature, in presence of two witnesses.

JOSEPH E. CAMP. Witnesses:

B. F. NAFZIGER, JOHN J. CAMP.

connected into the'conduit and also into t e 40' conduit and a check valve in said pipe, and a a 

